Loren, I have read about experiments wherein animals have been able to control robotic parts through neural impulse, but never of using a computer by such means.
Also, when you say "brain-controlled" computers, do you mean with the use of some sort of implant that communicates remotely to a computer, or do you mean to imply an actual psychic connection? For that matter, what is a psychic connection?
As it is, our computers are, in many ways, extensions of our own minds (all the more so, as we continue to delegate more and more of our basic thought processes to them (problem-solving, planning, scheduling, memorizing, &c)). It is not inconceivable that there will be a world wherein our computers are completely responsive to us, just as any part of our bodies (some physical implantation will probably be required, but it remains possible), but then they will not really be "brain-controlled" so much as they will be (and, in many ways, are) parts of the mind itself.
Just a thought. Andy Clark develops it in his book, "Natural-Born Cyborgs". It's a good read, but I'm not sure if it fits into your intended purpose for this thread.